The Audio Technica ATH-CKX9iSBK in-ear headphones are engineered to provide a superior listening experience with their large 13.5 mm performance-enhanced drivers. Designed for comfort and reliability, these headphones feature a C-tip design that conforms to the shape of your ear, ensuring they stay securely in place during your daily activities. With a luxurious zippered hard carrying case included, your headphones are not only protected but also easily accessible whenever you need them.